RO Membrane Filter Size

[BroccoliFarmer]

I am sure this has been asked, but I couldnt find it. My RO membrane is probably old enough that I need to replace it. Are RO membranes 'standard size' or do I have to buy a specific size to fit my RO unit? I know different membranes give different GPD..but I am just more worried about 'will it fit'. I had a local water company install my RO system a couple years back and they are no longer in business.

Any advice would be appreciated.

 

[takitaj]

Which model do you have? Can you post a pic?

All the "standard" type units take a standardized size membrane. For example this "standard" 10" type unit from BRS;

4 Stage Value Plus 75GPD RO/DI System

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www.bulkreefsupply.com

It would take a membrane like this;

100 GPD Reverse Osmosis Membrane - DOW Filmtec

The DuPont (formerly Dow Chemical) Filmtec 100 GPD membrane features a 98% rejection rate at 50 PSI which makes it the most commonly used 100 GPD membrane used in the aquarium industry. If you require slightly faster water production and have good water pressure this is one of the better...

www.bulkreefsupply.com

 

[BroccoliFarmer]

Outstanding. Thank you so much. I do have that 'standard style' RO unit.

Thank you

 

[Gtinnel]

AFAIK the physical size is the same on all of them. BTW I strongly recommend the Dow Filmtec membrane.

 

[Buckeye Hydro]

What is considered a "standard-sized" membrane in this hobby is called an 1812 residential membrane - 1.8" in diameter and 12" long (nominal).

 

[Water Dog]

Just be sure to match your membrane with the proper flow restrictor. Ideally, you should be getting anywhere around a 3 to 1 or 4 to 1 waste to product water ratio.

 

[Buckeye Hydro]

Just be sure to match your membrane with the proper flow restrictor. Ideally, you should be getting anywhere around a 3 to 1 or 4 to 1 waste to product water ratio.

Agreed, if you don't have soft or softened water.